Isilon: OneFS: How to check for a free inode and block count on /ifs

Summary: This documents the commands to check and verify the number of free inodes and blocks on the ifs partition.

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Instructions

Procedures

 

Verifying free inodes

To view the number of inodes available on a single node:

  1. Open an SSH connection on any node in the cluster and log in using the "root" account.
  2. Run the following command:
      
    sysctl efs.lbm.free_inodes


To view the number of inodes available on all nodes in the cluster:

  1. Open an SSH connection on any node in the cluster and log in using the "root" account.
  2. Run the following command:
      
    isi_for_array sysctl efs.lbm.free_inodes
  3. When prompted, enter the cluster root password.

    Output similar to the following is returned: 
    mycluster-1: efs.lbm.free_inodes: 50937255
mycluster-2: efs.lbm.free_inodes: 51111519
mycluster-3: efs.lbm.free_inodes: 51082744



Verifying free blocks

To view the number of free blocks available on a single node:

  1. Open an SSH connection on any node in the cluster and log in using the "root" account.
  2. Run the following command:
      
    sysctl efs.lbm.free_blocks


To view the number of free blocks on all nodes in the cluster:

  1. Open an SSH connection on any node in the cluster and log in using the "root" account.
  2. Run the following command:
      
    isi_for_array -s sysctl efs.lbm.free_blocks

    Output similar to the following is returned: 
    mycluster-1: efs.lbm.free_blocks: 535657939
mycluster-2: efs.lbm.free_blocks: 716745198
mycluster-3: efs.lbm.free_blocks: 222690305

Additional Information

The number of inodes is allocated to files and directories by the system dynamically. If more inodes are needed, an 8 KB block is used for 16 inodes (512-Byte inode x 16 = 8KB).

Affected Products

Isilon

Products

PowerScale OneFS
Article Properties
Article Number: 000021365
Article Type: How To
Last Modified: 27 Jun 2025
Version:  4
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